Self-balancing board



FIG. 1 is a perspective view of a self-balancing board showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevation view, with the right side being a mirror thereof; and,

FIG. 5 is a top plan view thereof.

The broken line shown in the drawings are for the purpose of illustrating portions of the article and form no part of the claimed design. 

CLAIM The ornamental design for a self-balancing board, as shown and described. 